Rare vascular tumors form in cells that make blood or lymph vessels. They can occur anywhere in the body, such as the skin, in the tissues below the skin, or in an organ. These tumors are named for the type of cells they look like and how they grow.
Some of the rare vascular tumors that affect children, teens, and young adults are:
Vascular cancers can form from the cells of the circulatory system, which is made up of blood vessels (left). They can also form from the cells that make up the lymphatic system, which carries a clear liquid called lymph that is important for the immune system (right).